import './assets/waves.css';

const vueWaves = {};
vueWaves.install = (Vue, options = {}) => {
    Vue.directive('waves', {
        bind(el, binding) {
            el.addEventListener('click', e => {
                const customOpts = Object.assign(options, binding.value);
                const opts = Object.assign({
                        ele: el, // 波纹作用元素
                        type: 'hit', // hit点击位置扩散center中心点扩展
                        color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
                    }, customOpts),
                    target = opts.ele;
                if (target) {
                    target.style.position = 'relative';
                    target.style.overflow = 'hidden';
                    const rect = target.getBoundingClientRect();
                    let ripple = target.querySelector('.waves-ripple');
                    if (!ripple) {
                        ripple = document.createElement('span');
                        ripple.className = 'waves-ripple';
                        ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
                        target.appendChild(ripple);
                    } else {
                        ripple.className = 'waves-ripple';
                    }
                    switch (opts.type) {
                        case 'center':
                            ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px';
                            ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px';
                            break;
                        default:
                            ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px';
                            ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px';
                    }
                    ripple.style.backgroundColor = opts.color;
                    ripple.className = 'waves-ripple z-active';
                    return false;
                }
            }, false);
        }
    })
};

export default vueWaves;
